Improvement in compounds for artificial stone



Aug iii @d'o niv \Ii U a '11 n1 9 0 CZ) '42 drwram cniww II? It W 1 mu/t.Cwvimnah. m H it 6am Ottawa) a: a al me t, Exami er UNITED STATESPATENT OEEIcE.

I06. COMPOSITIONS,

COATING OR PLASTIC.

JOHN S. RANDOLPH, OF PEORIA, ILLINOIS, ASSIGNOR OF ONE-HALF HIS RIGHT TOLOUIS F. MENAGE, OF MINNEAPOLIS, MINNESOTA.-

IMPROVEMENT IN COMPOUNDS FOR ARTIFICIAL STONE.

Specification forming part of Letters Patent No. 211,108, dated J annary'7, 1879; application filed September 30, 1878.

To all whom it may concern:

Be it known that I, JOHN SUMMERFIELD RANDOLPH, of Peoria,in the countyof Peoria and State of Illinois, have invented an Improved Oompound forArtificial Stone; and I hereby declare the following to be a full,clear, and correct description of the same.

My invention relates to the manufacture of artificial stone; antlconsists of a composition of certain ingredients chemically combined insuch manner as to produce a hard, crystallized material which isimpervious to moisture, and will withstand the action of frost in anyclimate, and is unaffectedbyjrmor fire antl water combined, or whenbrought in contact, as in the case of fires, thereby particularlyadapting it to use as a building material, or for any purpose for whichstone is used.

To enable others to understand and use my invention, I will describe themanner in which I have carrietl it out.

I place thirty gallons of clean water in a suitable vessel, and addthereto two ant onehalf pounds 0t sulphide pf potash, two pounds ofcarlo ate 0 'u'ium one ant one-half pound ot suI )IlillfG of iron andand four pount 1e a ter dissolved in,.two g'a ons o a co .iol, antl thenadded to,the mixture.

I mean by the term sulphate of iron and ammonium the chemical substanceformed by the union of the solution of tersul hate ot'i with thesulphate of amm mu t is prepared by heating the solution of'tcrsulphatep of iron with the sulphate of ammonium until the latter salt isdissolved, and then allowing the solution to cool. The two salts uniteto form the sulphate of iron antl ammonium.

These ingredients are well mixed by stirrin g. I then mix, while dry,five parts of clean sharp sand not too fine, or s. 5 'ra-vel and onepart of the best Eng is or ant ee- :11 No other will do. I film qua-r sof the com wound above described with fifty gallons oi clean water andtiioro'ughly mix them together. I tIlen use a suflicient quantity ofsaid last-mentioned tlilutetl mi;- ture to dampen the mixed sand andcement, so that itbaube'tampedih the usual manner.

I am thus able to produce an artificial stone of great hardness anddurability.

The stone, after being manufactured as above stated, should not bepermitted to become dry on the surface, but should be kept dampened withwater for about one week, in which time it will become petrified antlfit for use.

Having, as above, described my invention, what I claim, antl desire tohave securetl to me by Letters Patent, is

consisting of water, sulphate of potash, carbonate of barium, sulphateof iron antl ammonium, carbonate of soda, and alcohol, substantially inthe proportions above nametl, and diluted as above set forth, for thepurpose of producing the crystallization of the artificial stone,specified.

2. An artificial stone composed of sand and cement, in the proportion asabove stated, moistened with a chemical mixture, diluted as abovetlescribed, before tampin g, substantially as and for the purposes aboveset forth.

J OHN SUMMERFIELD RANDOLPH.

Witnesses:

SAnUEL SEABURY, JAMES M. RIcE.

1. The herein-described chemical compound,

